Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
; j% {) u3 T) a$ J3 N8 ]& F: QNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 - O* R3 q# Q7 N3 q5 k% V! c& X9 _
+ Author Affiliations
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9 U2 I8 S* K/ h4 K0 K% S1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 8 x' b4 C$ X1 r+ N
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan # u8 d+ S; K k* {6 Z: g5 r
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
* n0 ~( n8 w$ s0 i0 O+ V2 V$ j2 k$ c4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
+ e# c) e& P# [+ I. H; q! v5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
& @1 L+ W$ I& e# v9 N1 O% Z6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
4 u% _" j% z' i7Kinki University School of Medicine, Osaka 589-8511, Japan
6 A: e' Y4 U# x5 Q8Izumi Municipal Hospital, Osaka 594-0071, Japan
. G4 ]" A9 M/ p, c9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan & \# t, e. x p( Y6 M
Correspondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp 3 \2 p1 p) `: P; w* q! E
AbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type.
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